203504426013543 has 16 divisors (see below), whose sum is σ = 280770274874880. Its totient is φ = 130956581075936.

The previous prime is 203504426013523. The next prime is 203504426013557. The reversal of 203504426013543 is 345310624405302.

It is a cyclic number.

It is not a de Polignac number, because 203504426013543 - 2¹⁰ = 203504426012519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 203504426013495 and 203504426013504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203504426013523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 310148955 + ... + 310804412.

It is an arithmetic number, because the mean of its divisors is an integer number (17548142179680).

Almost surely, 2^{203504426013543} is an apocalyptic number.

203504426013543 is a deficient number, since it is larger than the sum of its proper divisors (77265848861337).

203504426013543 is a wasteful number, since it uses less digits than its factorization.

203504426013543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620957166.

The product of its (nonzero) digits is 1036800, while the sum is 42.

The spelling of 203504426013543 in words is "two hundred three trillion, five hundred four billion, four hundred twenty-six million, thirteen thousand, five hundred forty-three".